Information Coding through Adaptive Gating of Synchronized Thalamic Bursting

Cell Reports
Clarissa J WhitmireGarrett B Stanley

Abstract

It has been posited that the regulation of burst/tonic firing in the thalamus could function as a mechanism for controlling not only how much but what kind of information is conveyed to downstream cortical targets. Yet how this gating mechanism is adaptively modulated on fast timescales by ongoing sensory inputs in rich sensory environments remains unknown. Using single-unit recordings in the rat vibrissa thalamus (VPm), we found that the degree of bottom-up adaptation modulated thalamic burst/tonic firing as well as the synchronization of bursting across the thalamic population along a continuum for which the extremes facilitate detection or discrimination of sensory inputs. Optogenetic control of baseline membrane potential in thalamus further suggests that this regulation may result from an interplay between adaptive changes in thalamic membrane potential and synaptic drive from inputs to thalamus, setting the stage for an intricate control strategy upon which cortical computation is built.

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Citations

Jun 28, 2016·Neuroscience and Biobehavioral Reviews·Ingo HertrichHermann Ackermann
Oct 21, 2016·Neuron·Clarissa J Whitmire, Garrett B Stanley
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Oct 21, 2016·Journal of Neurophysiology·Clarissa J WhitmireGarrett B Stanley
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Mar 25, 2021·Journal of Neurophysiology·Clarissa J WhitmireGarrett B Stanley
May 13, 2021·Journal of Neurophysiology·Yi Juin LiewGarrett B Stanley
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